How to delete rolled over folder older than six months.

My application is using Rolling file appender. So the log files are daily rolled over to the folder having name yyyy-MM. ie 2014-03, 2014-04, 2014-05 etc. Now the requirement is to delete 6 months older folder from the path.

Is there any configuration to achieve this?

The current configuration is as below.
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<properties>
<property name="logPattern">%c|%K

|%t|%d

|%p|%C|%M|%L|%K

%n</property>
<property name="filePattern">${sys:logfilepath}//$${date:yyyy-MM}//${sys:oft.appserver}out%d

.log</property>
<property name="fileName">${sys:logfilepath}//${sys:oft.appserver}-out.log</property>
</properties>
<appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="logPattern"/>
</Console>
<RollingFile name="RollingFile" fileName="${fileName}" filePattern="${filePattern}">
<PatternLayout>
<pattern>${logPattern}</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
</Policies>
</RollingFile>
</appenders>
<loggers>
<AsyncLogger name="logtype" level="info" includeLocation="true" additivity="false">
<AppenderRef ref="RollingFile"/>
</AsyncLogger>
<root level="info">
<AppenderRef ref="Console"/>
</root>
</loggers>
</configuration>